Linking machine



Dec. 9, 1930. J. B. VALTON 1,784,713

LINKING MACHINE Filed June 6, 1928 2 Sheets-Sheet 2 I VVE/VTOR gleanBapisie Valion HTTOfT/YEY in the other machines in which the needlecomes in engagement with the points of the leaf-needles. Y c

The figures of the accompanying drawing illustrate, by way ofeXample,-t-he preferred form of construction of a mechanism ensuring theautomatic and rational association of the rectilinear reciprocatingmovement of itlhe 1riieedle with the continuous rotation of the o 7 Atthe end of the shaft 8 is mounted a second eccentric strap21 driving arod 22 on the end of which is, pivoted a crank 23; the latter transmitsto an intermediate shaft 24-, on which it is keyed, theangularreciprocating movement it receives from the rod 22. The shaft 24,parallel to the shaft 8, is supported by bearings 25 and drives in itsreciprocating movement of rotation a crank pin 26 terminated by a doublefork 28; theopening 27 of the latter gives passage to the needle-carrier20 sliding-in a member 29 secured to the frame. The branches 28 comingin engage ment with two rollers 30 integral with a U- viii moves backfor allowing the point of the hook to enter between the body of theneedle and the thread.

The hook grips, bymeans of its point, the thread presented by the needleit pulls it through the preceding loop and effects half a revolution byprogressively enlarging the loop thus formed.

The point of thehook abandons the loop to the heel piece of the hook;this'heel ,piece, which is of suitable shape,rgrips one of the sides ofthe loop'and turns it over for allowing it to completely free itselffrom the hook at the end ofthe operation; the heel piece causes the loopto slide on the back portion of the point of the hook which in-its turnprogressively abandons it, while the needle presents again its threadand allows it to be taken by the point of the hook which has come backto its first position; the needle Withdraws for pulling the thread ofthe first loop forming and tighteningthe stitch.-

The hook completely abandons the loop only at the timeits point hasalready gripped the new thread for the next' loop; at this moment, iteffects a complete revolution and is ready for the next stitch.

It is not necessary to describe with greater detail the operation ofsuch a machine.

A machine thus constituted allows very smooth movements anda rigorouslycontinuous action to be obtained, owing to the absence of any springsand cams. The hook is easily interchangeable, this considerablysimplifying-the adjustment of tlie machine, and the conditions of use ofthe latter.

It is to be understood that the forms, constructiona-l details,accessories, materials and dimensions of the improved. machine may bevaried without departing thereby from the scope of the invention.

1. A knitted fabric sewing machine, comprising aframe, a crownsupportedby this frame, a main drivingshaft which continuously rotates, a comb ontheperiphery of this crown, a ratchet wheel fixed to thecrown,.aneccentric. strap onithe said main shaft,.a rod rigid with thiseccentric strap, apawl actuated by the said rod and acting-on the ratcht wheel, a rotary loop-forming hooki with the said main shaft andco-axial n the same, a secondary shaft receiving from the main shaft anangular reciprocating movement, acra'nk arm rigid with thesecondary shat, a needle-carrierterminated by a voi ge and receivingthe movement ofthe l 01 mil: arm, aneedle secured on one of e branches of this-yoke andradially movrentively to the crown..

r; knitted fabric sewing machine,. comp'risinga frame, a crownsupported:by this frame, a main driving shaftwhich continuously rotates, a combon. the periphery of crown, a ratchet wheel fixed'to. the crown,eccentric strap on the said main shaft, a rod rigid with this eccentricstrap, a pawl actuated by the said rod and acting on-t-lie tchet wheel,a rotary loop-forming hook igid with the said main shaft and co-axialwith the same, a secondary shaft receiving from the main shaft anangular reciprocating movement, a crank arm rigid. withthe secondaryshaft, a fork at the ends of this crank arm, a needle-carrierterminatedby a yoke, rollers on the carrier and extending in he for; ofthe crankarm, a needle secured on one ofthe branches of the said yoke andradially and alternately moving relatively to thecrown. s i g Theforegoing specification of my link-v ingmachine signed by me this-23rdday' of May, 1928. r JEAN BAPTISTE'VALTON.

